XYY+Syndrome

= **What are some symptoms of XYY Syndrome?** = There aren't many physical changes in people with XYY Syndrome. They go through life normally, and have a normal life expectancy. However, they have a slightly higher growth rate than most other people and a final height expectancy that's around 3 inches higher than most people. However, there are several behaviorial defects associated with XYY syndrome. Males with the syndrome have a higher rate of learning disabilities. They also have lower IQ scores on average. Other than that, their behavior is relatively normal. As you can see, XYY syndrome is not the worst of genetic diseases.

= **How would somebody get XYY Syndrome?** = Somebody gets XYY Syndrome through an error in meiosis (specifically in anaphase II) called nondisjunction. This error occurs when homolugous pairs fail to seperate properly, producing sperm cells that have an extra y-chromosome. If one of the sperm cells contributes to the makeup of the zygote, the zygote will have an extra y chromosome. If this happens, every cell in the child's body will have an extra y chromosome. Or, in other words, they have XYY Syndrome.

= **Who does XYY Syndrome occur in?** = = = This syndrome occurs rarely. It's specific to males, so females will never get this disease. It also occurs very rarely, only one in one thousand boys get it. There's no way to stop yourself from getting this disease; it occurs randomly during the production of sperm cells. It's not affected by anything about the parents, so your parents won't affect whether you get this syndrome. However, it's very rare and not that severe, so not many people are actually at risk from it. So don't worry that you'll get this syndrome!

//A diagram of nondisjunction during meiosis, which will eventually cause XYY Syndrome.//